Molding-machine.



No. 851,166. PATBNTBD ABR. 2s, 1907.

G. HERMAN. MOLDING MACHINE.l APPLICATION FILED JUN'E 22. 1905.

4 SHEETS-SHEET 1.

PATENTED APR. 2s, 1907.

C. HERMAN. MOLDING MACHINE. APPLICATION FILED JUNE 22. 1905.

4 SHEETS-SHEET 2'.

Fgg.

INVENTOR 110.851,16. PATENTBD 1111.23, 1907.

C. HERMAN.

MOLDING MACHINE.

1111110111011 FILED 11111322. 1905.

4 SHEETS-SHEETS.

PATENTED APR. 23, 1907.

C. HERMAN. MOLDING MACHINE. APPLIGATION FILED JUNE 22. 1905.

4 SHEETS-SHEET 4.

MIIIHI wnNEssEs orni'nnns HERMAN, or innnennnr, rnnnsrnvanm, Assieuon ToHERMAN FNEUMATO MACHINE COLIIPANY,

F ZELlENOPLE,

PENNSYLVANIA, A CORPORATON @F PENNSYljVANlA.f

no. serios.

Specification of Letters Patent.

Patented April 23, i907.

Application filed June 22, 1905. Serial No. 266,480.

To LM whom it` may concern:

'Be it known that l, CHARLES HERMAN, a resident oit-Allegheny, in thecount-y of Allegheny and State of Pennsylvania, have invented `a new anduseful Improvement in i Molding-lldachincs; and l do hereby declare thefollowing to be a full', clear, and exact description thereof.

My invention relates to molding machines and has special reference tothat class ol' sand molding machines shown in Letters Patent No. 706,751granted to me on August 12,1902. The obj ect of my invention is toprovid ea cheap, simple and effective device for lifting the llask fromaround the pattern resting upon the jarring device, after a mold hasbeen formed in said flask, in an even, rapid and easy manner and withoutthe employment of laborious and uncertain devices.

v further object of the invention is to cheapen, simplify and rendermore eil'eetive the jarring mechanism and thereby compact the sandaround the pattern in the il ask more j rapidly and evenly.

. normal position.

4parts in a normal position.

To these ends my invention consists, genorally stated, in the novelarrange1nent, con struction and combination of parts, as hereinattermore specifically set forth and described and particularly. pointed outin the claims. Therefore, to enable others skilled in the art to whichmy invention appcrtains 'to construct and "use my improved molding,

machine, I will describe the same more fully,

`referring' to the accompanying drawings, in

Figure lis a side elevation oi my improved molding machine showing theparts in their Fig. 2 is an end View and partly insection of the same,showing the mold and flask raised 'iron'i the pattern after the `sandhas been jarrcd and the Amold formed. Fig. 2 a like view showing theFig. 3 is a vertical section oi-the jarring devices. Fig. 4 an enlargedvertical section ol the 'valvechest 'and looking at the 'lace of thevalve. Fig. 5 is a top plan view oii the inachiiic with thepattern-plate removed. Fig. is a crosssection on the line (l--G Fig. 4.

Like symbols of reference herein indicate like parts in each ol thefigures of the drawings.

As illustrated in said drawingl is the base plate upon which my improvedmolding machine is supported and upon which the usual jarring-block l issecured, while extending up from said base-plate and around said block.is the cylindrical casing 2 which is provided with the enlarged upperend 2 and is i secured to said plate bythe bolts 3 passing through theflange 3 on said casing and taking into said base-plate. Nithin thecasing 2 is the jarring post 4 which has the crosshead 5 litting aroundand secured to the upper end of the same and on this head are a seriesoi upwardly extending projections or lugs 5 which slide on the guides 5and support the pattern-plate 6 on which the pattern 6 mounted, whilesaid pattern-plate is provided. with a series ol lugs 6 lor supporting astripj'iing-plate 7 upon which is carried the ilask 8 having lues 8extendinv out from b b D the saine for engaging with the dowel pins 7"and with the lugs 7 of the stripping-plate.

The lower end ol the jarring post 4 is adapted to contact with thejarring-block in the operation of jarring, as hereinafter described, andthe raising` and lowering ol this post is accomplished by the arringmechanism which is located in the casing 2 and coinl. prises a cylinderSl which extends around said post and is held in place and stationary bybeing suitably secured to the casing 2. The cylinder 9 is provided withthe usual heads 9, and stulling boxes 9 thereon through which the post 3is moved, and such post is provided with a piston l() secured thereonvfor working within said cylinder, while from the upper heed pipes ilproject upwardly to allow the air within the cylinder above the pistonto escape in its upward strokel to prevent any cushioning action withinsaid cylinder and at the saine time permit the air to enter saidcylinder in the downward stroke to assistthe -lrce movenient ol saidpiston, such pipes having elbows l1 at their upper ends in order toprevent any sand dirt ctc. entering said cylinder throughsaid pipes. Thecylinder l) has the valve-chest l2 within which travels a slide valve 13which is provided with. the narrow supply )ort 13 -within the same andthe large ex vcust chamber 13 which are adapted to communicate with thesupply and eX- haust ports 14 in the cylinder wall leading through andinto the lower end of the cylinder 9 and the auxiliary exhaust-port lain said cylinder wall, while the latter port` 11i opens at itsl lowerend into the casin l2. Connected to the slide-valve 13 is the vavestern` 15 which moves through the usual stuffing boxes 12." on eachend of the valvefchest 12 and through a lug 5/ on the cross-head at theupperend of said stern, while the movement of the stem is limited by thenuts onsaid stern. The valve-stern ts within a yoke l13W on. the valve13and is held in vplace by the shoulders 15? on said stem fittingagainst each side of said yoke, while bar's 16 are placed on said valveand s rings 16lv 'are `interposed around 16 on sai vbarsflandfbetweensaid bars and the enter Aside of' the valve-chest'12 tohold said valve in place yagainst the walls of the cylinder 9 and coverthe ports 14, -14.therein. Leading from any suitable source ofsupplv isthe valve controlled supply pipe 17V which'passes through the walls ofthe casing 2 and 1s screwed into the outer sidewall of the valve-chest12 for supplying. thauid pressure into said chest.

The liitin pacting oft e sand therein by the Vjarring mechanism abovedescribed so as to form the mold cavit 8 by the"v pattern 6 is anoperation simi ar to that shown and described in the patent referred toand in Let# ters Patent N o. 647,673 granted to Henry C'. Herman, April17, 1900 for a molding Inachine and consists of two lifting, v devicesplaced one on each side of the casing 2 having the shafts 18 providedwith crss`pieces 19 at their upper ends, on which the horizontalextensions 20 are mounted, which are plate 1.

ends with an upwardly extending removably secured to each end of saidcrosspieces' by the adjusting bolts 19 passin through holes 20 in theextensions an taking into the said cross -pieces These horizontalextensions are provided with a number of holes 20 or slots if desiredtherein to permit the adjustment of the same for different sizesofstripping-plates and flasks and they are also provided at their innerflange 20" for engagin with the stripping p ate to raise it and the askwhen desired and as hereinafter described.

The lifting-shafts 18 are connected to the cross-pieces 19 at theirupper ends by means of the sockets 2()a formed on said pieces and areheld therein by means of the set-screws 20b passin through said socketsand engaging with t e said shafts. Below the crosspieces 19 the shafts1S pass through caps 21 and into cylinders 22 which are secured at theirlower ends by the threaded connections 23 within sockets 23 formedon'the base- These shafts 18 have pistons 18 .secured at the lower endsthereof and4 they Yare also provided with a key 24 therein with oftheliask `8 after the com-' which a key-way 24 in the caps 21 engages' inorder to keep said shafts from turning. The caps 21 are secured by bolts21 to the brackets 25 which extend out from the cas-l y ing 2' and aresecured thereto by bolts -125 passing through flanges 25' on saidbrackets and taking into said casing. These brackets 25 in addition tosupporting the ca s 21 also have the upper ends of thecylin er 22extending into the same lwhere they are sup Eorted and secured by athreaded connection l 2.3 atthe lower ends their opposite ends areconnected` to a .'1-

coupling 26 which is connected to the branch-pipes 27 extending at rightangles to the branch-pipes 26 from which the vertical pipe 27 extendsupwardly in front. of the casing 2 and is supported by the bracket 2 84-extending from and secured to said casing 2'. At the upperl end of thevertical pipe 27 is the three-way controlling valve 29 to which isconnected the supply pipe 29 whichleads from any suitable .source ofsupply ah'd such valve is provided with the operating handle 29.VBetweenthe caps 21 and brackets 25V are the vents 30st which will allwthe air' within the cylinders 22 and above the piston IOO 18 to escapeon the upward movement of the l shafts 18 in order to prevent anycushioning action within saidcylinders and atthe same timeperrnit theair to enter said cylinders in the downward movement V`of said .shaft inorder to assist the free movement of said pis ton.

shafts 18 and secured thereto by the set screws 30 are the brackets 30which extend out therefrom and have pins 30 secured therein to which thelinks 31 arepivotally connected at one end while the Opposite ends ofsaid links are pivotally connected to the forkedends 31 of the arms 32.The arms. 32 are secured by a key connection 32 at their opposite endstothe ends of a rockshaft 32 which extends across in the rear of thecasing and acts to connect the two lifting devices together so that theyshall move in unison. This shaft 32 is mounted in the upper ends of thestandards 33 andsuchstandards are secured to 'the base-plate 1 by thebolts 33, While the shaft is held in position by means of collars 34thereon fitting against said bearings and secured to said shaft by theset-screws 34.

Extending through holes 35 in a projecting portion 25 on the bracket 25are the vertical rods'35 which are carried by the bracket Extendingaround the upperend of the and. pass through holes 35 in said brackets30. These rods are hung from the brackets 30 by the headsI 36 at theirupper ends and their lower ends are provided with the spiral springs 36which are held thereon by plates 37 fitting around said rods and againstthe adjusting nuts 37 engaging with the lower ends of said rods, suchsprings acting to engage with the projecting portions 25 on the brackets25 when the shafts 18 are moved upwardly and thereby overcome any shocksor knocks taking place to the parts in such movement. The nuts 37 willalso permit the raising and lowering of the springs 36 along the rods 35in order to permit the adjustment of the said springs at differentheights on said rods to vary the heights to .which the lifting shafts 18may be raised.

Supporting rods 38 are secured at their lower ends to the base-plate 1by a threaded `lugs y6 of the pattern-plate, after which the flask isplaced over the pattern andL held in fplace by the dowel pins 7.

then filled with sand and the operatorap- "plies the o erating fluid,preferably cornj pressed air The flask 8 is rom any suitable storagetank,

".ja'irpump or other source of isupply through through the narrow port13" in the side-.

, the supply pipe 17 into the valve chest 12 and y passing around saidchest will )ass valve and thence into the cylinder -9 through theport 14a'n'd raise the piston 10 anclfpost 4 to their highest position.

v Y head lconnected to said post is also raised andbyreason of thelugs 5on said cross-- jliead-iitting 'under rand against the pattern- As thepistoni() and post 4 are thus raised the crossplate 6 ythe saidv plate,pattern 6, strippingplate 7 and ilask 8 containing the sand are allraised. As the cross-head 5 is thus raised the lugm thereon will strikeagainst the upper nut i5 on the valvestem 15 and so raise the stem andslide-valve 13 so that the supply port .13 will be covered and theexhaust chamber 13 will be placed "in communication with the ports 14,14 in the cylinder 9, thereby'shiitting off the supply of air to saidcylinder from the pipe 17 and allowing .the air to exhaust through theports 14, 14', which will permit the post 4, cross-head 5,

-pattern '6 and ilask 8 to drop so that the )wer end of the said postwill strike against the jarringblock to compact the sand in the saidflask around the pattern'. Just before the time that the lower end ofthe post 4 has struck the jarring-block, the lug 5" on the cross-head 5will have come in contact-with,`

the lower nut 15 on the valve stein 15 which will ac't to lower saidstem and valve 13 thereon so that the narrow portlB will againcommunicate with the supply ort 14 and admit the air to the cylinder 9 tough said ports s 'raise said flask with 'its inold cavity from aroundthe pattern, the operator turns the handle 29 of the valve 29 in theproper direction which will allow the fluid pressure, and preferablycompressed air from any suit able storage tank, air pump or other sourceof supply to pass through the supply ipe 29 and through the vertical andbrano pipesl 27 27 and 26 to the cylinders 22. As the air thus entersthe cylinders 22 and under the pistons 18 it will act to raise said'pistons and shafts 18Y thereon through the' ca s 21 and with them thecross-pieces 19 an( brackets 30 and as these partsl are also raised theprojections or flanges 2Ol on the extensions 20 of said cross pieceswill engage with the bottom or the lugs 7 of the stripping-plate 7,thereby raising said plate and with it the flask 8 away from thepattern-7 while the lOO pattern and pattern-plate 6 remain stationary onthe cross-head 5, during this operation, as shown in F ig. 2. Duringthis operation of raising the shafts 18 and flgask 8 it will be evidentthat both shafts will be controlled in their movement and will be raisedsimultaneously and in unison by reason of the saine being cou led orconnected together as before describer` After these parts are thusraised they are held from dropping by .the pressure of the air withinthe cylinders 22, so

that when the stripping-plate 7 and flask 8 have been thus raised abovethe to of the IIO pattern 6, the operator lifts the las `oli thestripping-plate and carries it to any suitable place, after whicfi thelifting shafts'lS andy their connecting arts can be lowered byturninghoi the va ve 29 which will allow the air wit in said cylindersto pass therefrom and return through the branch, vertical andsupply-pipesrand escape through the valve 29, thereby returning thelifting devices to their normal positions, as shown in dotted lines inFig. 2 and. readyfor another operation of lifting the flash lt will beevident that other fluid than airsuch as steam etc., can be used tooperate IOv the motor 'ofthefjarring' mechanism, as well as the lifting.devices, and that ,various other modifications and changes in theconstruction and operation of the machine may be resorted to withoutvdeparting from the spirit of the invention or sacrificing any of itsadvantages.

My machine is simple in its construction and operation, Vis veryldurable and by its use it has been found that'the sand will be easily,

, 'rapidly and thoroughly packedv around the pattern to form a perfectmold cavity. The

stripping-plate and flask can be easily,

quickly and uniformly raised from around the pattern and without theemployment of any hard or manual labor. The lifting shafts for raisingthe flask will be controlled at all times by the toggle joint connectedwith the rock shaft, thereby overcoming any tilting or wabbling of theliask in such raising operation, and preventing any liability ofinjuryto the mold cavity within such flask.

What l claim as my invention and desire to secure by Letters Patent' is:

1. In a molding-machine, the combination of a base, a casing mountedthereon, a pattern-plate supported by -the casing, a stripping-platesupported by and above said pattern-plate and carrying a flask, pov. ercylin` ders mounted on opposite sides of said casing, lifting shaftsoperated by said cylinders for raising and lowering the stripping-plate,a rock-shaft mounted on said base and extending across the same andatsome distance from the exterior of the casing, and connections betweensaid rock-shaft and said lifting shafts whereby the said lifting shaftsare caused'to move in unison; substantially as described.

2. 'In a molding-machine, the combination of a base, a casing mountedthereon7 a pattern-plate 'supported by the casing, a stripping-platesupported by and above said pattern-plate and carrying a flask, powercylinders mounted on opposite sides of said casing, lifting shaftsoperated by said cylinders for raising and lowering the stripping-plate,a

rock-shaft mounted on said base and exterior brackets secured to saidbase, a rockshaft` mounted in said brackets exterior to said casing andextending across the base, and toggleflevers connected to saidrock-shaft andlifting shafts whereby the lifting shafts are caused tomove in unison, substantially as described.

In testimony whereof, l the said CHARLES HERMAN have hereunto set myhand.

CHARLES HERMAN. Witnesses WALTER FAMAniss, J. N. COOKE.

